South China Sea Tensions Persist as ASEAN-China Code Stalls
The South China Sea remains a flashpoint for regional tensions in 2026. China claims roughly ninety percent of the strategic waterway through its nine and ten-dash lines, but these claims were rejected by a 2016 international tribunal. Multiple clashes erupted in July 2026 between Chinese and Philippine coast guards at disputed areas like Scarborough Shoal and Second Thomas Shoal. ASEAN and China have been negotiating a Code of Conduct since 2002 to manage tensions, with a July 2026 deadline originally set. However, deep divisions persist. The Philippines wants a legally binding agreement with enforcement mechanisms, which China opposes. Additional friction points include Beijing's proposals to ban joint military exercises with external powers and restrict resource exploration. Vietnam is strengthening its infrastructure in the Spratly Islands, while China continues expanding coast guard deployments and island-building. Diplomatic talks remain largely stalled despite recent military-backed incidents, with daily confrontations at sea now outpacing diplomatic progress.
Key facts
- China claims roughly 90% of the South China Sea through its nine-dash and ten-dash lines, rejected by a 2016 international tribunal ruling
- China and Philippines clashed three times in a single week in July 2026 at Scarborough Shoal and Second Thomas Shoal
- The ASEAN-China Code of Conduct negotiation began in 2002 with a July 2026 deadline originally set but remains incomplete
- Disputed areas include Second Thomas Shoal, approximately 200 kilometers from Philippines territory but 1,500 kilometers from China
- Nearly 70% of the Code of Conduct's text was reported as agreed by end of 2025, but major issues remain unresolved
- Approximately $3.4 trillion in annual trade passes through the South China Sea
How different outlets framed it
Left-leaning coverage: Left-leaning analysis emphasizes ASEAN agency and multilateral diplomacy, focusing on Southeast Asian states' hedging strategies between great powers. These sources highlight how smaller nations navigate competing pressures from both Beijing and Washington while attempting to preserve regional autonomy and support for international law frameworks like the 2016 arbitral ruling.
Right-leaning coverage: Right-leaning sources frame the situation as Chinese expansionism and military aggression that threatens freedom of navigation and regional security. They emphasize Beijing's violation of international law, the illegality of the nine-dash line, and the need for stronger U.S. military presence and allied commitment to deter Chinese dominance. These outlets stress that strategic competition and China's military buildup justify robust Western responses.
Limits of this briefing
Sources are predominantly from Western, regional, and academic perspectives. Chinese state media and official Chinese positions on the disputes are underrepresented in available English-language reporting. The outcome of Code negotiations remains uncertain, and rapid escalations at sea can outpace diplomatic developments.
Sources
- Council on Foreign Relations: Territorial Disputes in the South China Sea Centre
- East Asia Forum: Drifting through dispute in the South China Sea Centre
- The Washington Times: U.S. joins Western, Asian allies in reasserting illegality of Beijing's South China Sea claims Right
- Chatham House: With the Philippines as ASEAN chair, a South China Sea agreement is unlikely to be concluded in 2026 Centre
- George W. Bush Presidential Center: China continues to militarize the South China Sea – here's what should be done Right